Table 2 Optimal serum levels for ultra-endurance runners/walkers
From: Nutritional implications for ultra-endurance walking and running events
Micronutrient | Serum marker | Optimal serum level |
|---|---|---|
Vitamin C | L-Ascorbic acid | 40-60 μM |
Calcium | Calcium | 4.5–5.5 mEq/L |
Vitamin D | 25-hydroxyvitamin D | 75–100 nmol/L |
Vitamin E | Alpha Tocopherol | 5.5–17 µg/mL |
Folate | Plasma folate | 2.7–20 μg/L |
Vitamin B12 | Holotranscobalamin | 35–156 pmol/L |
Iron | Ferritin | >50Â ng/mL |
Magnesium | Magnesium | 1.5–3.0 mEq/L |
Zinc | Zinc | 84–159 µg/dL |